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(: Test: K-DayTimeDurationSubtract-3                     :)
(: Written by: Frans Englich                             :)
(: Date: 2007-11-22T11:31:21+01:00                       :)
(: Purpose: Simple test of substraction two arbitrary xs:dayTimeDurations. :)
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xs:dayTimeDuration("PT0S") - xs:dayTimeDuration("P3DT4H3M3.100S")
			   eq xs:dayTimeDuration("-P3DT4H3M3.100S")